Typewriting machine



A. G. F. KUROWSKI.

TYPEWRITING MACHINE.

APPLlCATION FILED APR. I5, 1920.

1,410,478,, j Patented Mar. 21,1922.

PATENT @FFHQE.

ALFRED G. KUROWSKI, 0F BROOKLYN, NEW YORK, ASSIGN'OR. TO UNDERWOOD TYPEWRITER COMPANY, OF NEW YORK,1\T. Y., A CORPORATION OF DELAWARE.

TYPEWRITING MACHINE.

' Specification of Letters Patent. Patented Man, 21, 1922.

Original application filed April 11, 1919, Serial No. 289,203. Divided and this application filed April 15,

i 1920. Serial I\ To. 373,997.

To all whom it may concern:

Be it known that I, ALFRED G. F. KU- ROWSKI, formerly a subject of the Emperor of Germany or a citizen of Germany, but now a citizen of the United States, residing in Brooklyn Borough, in the county of Kings, city and State of New York, have invented certain new and useful Improvements in Typewriting Machines, of which the following is a specification.

This invention is a division of my application No. 289,203, filed April 11th, 1919, and relates to typewriting machines, and particularly those of theUnderwood type of construction, and one object of the invention is to render the type-bar action less noisy. The type-bars are usually arrested by striking a solid stop or anvil just as the types are about to strike. the platen; this stop being placed near the type-bar hubs, and the type-bars springing past the arresting point, so as to deliver the type impression upon the platen. One of the features of the present invention is to provide a yielding stop for the type-bars in place of the rigid stop heretofore employed. This stop, which is in the form of a segment, is in the nature of a yielding support or cushion.

- Such cushioning means may consist of a hardened and tempered spring inserted into a dovetailed groove in the type-bar segment, said spring having a. type-bar contact surface or crown.

Other features and advantages will hereinafter appear.

In the accompanying drawings,

Figure 1 is a side elevation of an Underwood typewriting machine, showing my cushioning means applied thereto.

Figure 2'is an enlarged detail of a section of the type-bar segment, showing the typebar stop and cushioning means.

Figure 3 is a front view.

Figures 4 and 5 are detail views.

Referring to the drawings, key-levers 1, through means of intermediate levers 2, are

adapted to swing type-bars 3 upwardly and rearwa-rdly against the front face of a platen 4 mounted in a carriage 5. The type-bars 3 are pivoted at 6 to type-bar segment casting 7, the line of pivots forming an are.

In order to arrest the. types as they are about to strike the face of the platen, I interpose a stop in the path of movement of a cut or dovetailed, and fitting into this groove is a cushioning spring 14 of hardened and tempered steel, having the shape shown in Figures 4: and 5. The type strike the fiat outer surface 14:, which merges at each edge into the small upper end 14 of an S-shaped side terminating in a large bottom 14 which fits into the undercut 13. It will be seen that the ridges at the base of the cushioning springs, which fit into the undercut ortions of the groove 13, are C-shaped. V ith this form of spring, no separate securing means is necessary, the tension of the spring itself holding it in position. It will be seen that the cushioning spring 14: is crownshaped in cross-section (Figure 4), and that it may be inserted endwise into the dovetailed groove 13. Furthermore, if it is de sirable to present a new striking surface for the type-bars in case of wear. the spring may be moved endwise slightly for this.

purpose, I

In the above-described forms, the cushion comprises a metal plate against which the type-bars strike. This plate is located nearbar segment supporting said type-bars, said segment having a groove with undercut edges, and spring-cushioning means for said type-bars having means to engage said un-' dercut edges, whereby said cushioning means is secured to said segment.

2. In a typewriting machine, the combination with a series of type-bars, of a typebar segment for supporting said bars, said segment having a groove with. undercut edges, and spring'cushioning means for said type-bars formed as an integral structure, said spring having ortions thereof formed to engage saidun ercut edges, and other portions forming a crown against which the type-bars contact.

3. In a typewriting machine, the combination with a series of type-bars, of a typebar segment supporting said type-bars, said segment having a circular groove with undercut walls, and a spring-cushioning element for said type-bars, said spring-cushioning element being shaped toco-operate with undercut walls of the circular groove, so that, when inserted endwise into said groove, it will be held therein.

4.. In a typewriting machine, the combination with a series of type-bars, of a typebar segment supporting said type-bars, said segment having a circular groove, a springcushioning element having a striking face forsaid type-bars, and means whereby said spring-cushioning element will be heldin said groove but will be permitted to slide endwise therein to present new portions of the striking face to the type-bars.

5. In a typewriting machine, the combination with a series of type-bars, of a typebar segment supporting said type-bars, a cushioning element on said segment for said type-bars, said cushioning element having a striking face for said type-bars,.and means whereby said element will be held against movement away from said segment but permitted to be moved so as tobe adjustable endwise to present new portions of the striking face to the type-bars inmate 6. In a typewriting machine, the combination with a series of type-bars, of a typebar segment supporting said type'bars, and a spring-cushioning element on said segment spring-cushioning element for said typebars, said spring-cushioning element comprising a flat striking face and two C-shaped resilient ridges, said ridges fitting into the circular groove of said segment.

8. In a typewriting machine, the combination with a series of type-bars, of a typebar segment supporting said type-bars, said segment having a dovetailed groove therein, and a cushioning element for said bars, said cushioning element being crown-shaped in cross-section, the base of said cushioning element flaring outwards to fit into said groove to hold said cushioning element on said segment.

9. In a typewriting machine, the combination with a series of type-bars, of a typebar segment supporting said type bars, a spring-cushioning element for said typebars, said spring-cushioning element being crown shaped in cross-section, and means to hold said cushioning element on said typebar segment.

ALFRED F. KUROWSKI.

Witnesses CATHERINE A. NEWELL, EDITH B. LIBBEY. 

